An 11.88 carats Burmese sapphire and diamond ring, French. Estimate £60,000 - 80,000 (€82,000 - 110,000).  Photo: Bonhams.

The cushion-shaped sapphire, weighing 11.88 carats, within a tiered mount composed of brilliant-cut diamonds, with marquise-cut diamond accents, on a bevelled hoop, diamonds approximately 4.35 carats total, maker's mark, French assay mark, ring size K

Accompanied by a report from Gubelin stating that the sapphire is of Burmese origin, with no indications of heating. Report number 1005131, dated 26 May 2010.

Bonhams. FINE JEWELLERY, 24 Sep 2015 12:00 BST - LONDON, NEW BOND STREET